hypothesis. She believes that the strength of public
opinion is from the nature of our society, from
draconian laws for the prohibited views and
behaviors, and from the individual fear of isolation
from others. People express favor when the voice of
favor is rising, and are silent when the voice is
falling.
Group norms can lead to the generation of group
pressure, thereby change the direction of network
public opinions. Group norms refer to considered
behavior expectations in specific group activities for
members, which is a standardized concept
established by a group. In Internet, there are also
norms to follow by net groups. These specifications
and guidelines have invisible binding for members
of groups. Only complying with group norms,
people can communicate smoothly with each other,
and people can be accepted and recognized.
Otherwise, people may be suppressed, marginalized
or even expulsed. Appropriate normative guidelines
can influence and control members, and can
effectively change their attitudes.
2.3 Group Polarization Mechanism
In 1961, the earliest group polarization is proposed
by Stoner who is from MIT. Through empirical
researches, he discovered as follows: In the group
decision-making situations, opinions or decisions of
individuals, are often influenced by inter-group
discussion, and consistent results produce which are
usually more adventure than the earlier ones of
individual. Stoner calls it risk shift. Risk shift was
eventually called group polarization by other
scholars, because they found that after a group
discussion the views or a decision of individuals
sometimes tend to one end of adventure, and in
some cases tend to the conservative end. Therefore,
group polarization is defined as: at the beginning,
there has been some bias of views in the team. After
discussion, views continue to move toward the
direction of bias, and finally an extreme view
format.
The phenomenon of group polarization is more
vulnerable for network public opinion. Internet users
who have the same interests will form virtual groups
on the network, and will have a strong group identity,
so it is prone to the polarization of views. Compared
to the face to face groups, the polarization of
network groups are more pronounced.
The factors that promote group polarization of
network public opinion include a number of aspects,
both the direct stimulation of public events, but also
the filtering effect of network media, but also from
the nature of coherence within groups. The process
of group polarization is shown as figure 3.
Figure 3: The process of group polarization.
1) Event-driven. In essence, events are the basis
and momentum of group polarization of network
public opinion.
2) Internet Filtering. Compared with the real world,
the network provides a systematic filtering natural
environment of information, which makes the
network easy to form homogeneous members within
groups and heterogeneity members intergroup. The
network Helps and strengthens the gathering of
people who have similar interests but are at different
place. Meanwhile, the information on the network is
unlimited, but the information accepted by users is
limited. Internet users have to choose the
information that is valuable and interesting for them.
The network technologies, such as hyperlinks, help
them filter their seen, read and hear things, and
enhance the select ability of information, so they can
selectively access and continually strengthen the
same information. Therefore, the seemingly
personalized information filtering eventually leads
to a "narrowing of information". More and more
Internet users can only hear their own echo, and the
network interaction becomes a "whispering gallery".
The speed of polarization of network public opinion
greatly accelerates.
3) Group Collaboration. The nature and
characteristics of network groups determine the
emergence of group polarization of network public
opinion. The research on social psychology shows
as follows: because of the role of mechanisms in the
collective unconscious, when individuals access to
groups, their psychology will produce a change of
which can not help but lose self-consciousness.
Individuals’ personalities are under varying degrees
of repression, so, even without any external
compulsion, individuals will instead their own
spirits of the groups’ spirits.
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